Household
Household Budget Calculator
Household budget for families: combined income and shared expenses like rent, groceries, childcare and utilities.
Left over = income − Σ expenses
Also called family budget · home budget planner
Everyday & Lifestyle · 10 calculators
Household Calculators
Household budgets, electricity and water usage, appliance costs, cleaning solution ratios, moving boxes and room space.
Household
Electricity Cost Calculator
What an appliance costs to run per hour, day, month and year at your tariff.
cost = watts ÷ 1000 × hours × rate
Also called appliance running cost · cost to run appliance
Household
Water Usage Calculator
Household water consumption per day, month and year, with the cost and a fixture breakdown.
daily litres = Σ (fixture uses × litres p…
Also called water consumption calculator · household water use
Household
Appliance Running Cost Calculator
What each household appliance costs to run per use, per month and per year.
cost per use = kWh per use × rate per kWh
Also called cost to run appliance · washing machine running cost
Household
Mixing Ratio Calculator
Mix two liquids to a ratio — cordial, cocktails, cleaning solutions or fuel mix.
concentrate = total ÷ (1 + ratio)
Also called dilution ratio calculator · cordial dilution
Household
Room Area Calculator
Floor, wall and ceiling area of a room in one go — everything you need for a decorating order.
floor = l × w
Also called room size calculator · room square meters
Household
Box Volume Calculator
Volume and capacity of a box in cm³, litres, cubic feet and cubic meters — for shipping, storage and moving.
V = L × W × H
Also called package volume · carton volume
Household
Moving Boxes Calculator
How many boxes you need for a move, by home size and packing materials.
boxes ≈ (bedrooms × 18 + people × 8 + 20)…
Also called packing boxes calculator · how many boxes to move
Household
Furniture Space Calculator
Whether furniture fits a room, with walkway clearance and the space left over.
free space = room area − walkway allowanc…
Also called will my furniture fit · room layout calculator
Household
Split Expense Calculator
Split a bill evenly or by share, with tip and the settle-up payments.
per person = (bill + tip) ÷ number of peo…
Also called bill splitter · split the bill calculator
Key household formulas
| Household Budget | Left over = income − Σ expenses |
|---|---|
| Electricity Cost | cost = watts ÷ 1000 × hours × rate |
| Water Usage | daily litres = Σ (fixture uses × litres per use) |
| Appliance Running Cost | cost per use = kWh per use × rate per kWh |
| Mixing Ratio | concentrate = total ÷ (1 + ratio) |
| Room Area | floor = l × w · walls = perimeter × height − openings |
| Box Volume | V = L × W × H |
| Moving Boxes | boxes ≈ (bedrooms × 18 + people × 8 + 20) × how much you own |
| Furniture Space | free space = room area − walkway allowance − furniture footprint |
| Split Expense | per person = (bill + tip) ÷ number of people |
Household questions
How much does it cost to run a 2 kW heater for an hour?
At 28p per kWh it costs 56p an hour — 2 kW × 1 hour = 2 kWh.